there are several skiers whose style has lasted through the ages for reasons that are asethetic, original or crazy in nature: Auclair/Cusson, Candide, Pollard, Mickael, and even Seth (some people love big-ass laid-out bacflips and loops).
there are some skiers whose style seems to be the latest thing: Rainville, Vanular, Sammy Carlson and whoever is the next kid on the block.
some skiers have made smaller, yet very influential contributions to style: think Skogen circa '99/'00, or Pep circa Session 1242.
but none of those skiers' style will last like T Hall's style: universally dominant.